Find the sum 140 Preview 281 Enter a mathematical expression (more...)

Question

Question

math calculus

Answer 1

Answer #1

Ans: 13098

Sum of n= 2*n*(n+1)/2

=n*(n+1)

So sum of 2n from 81 to 140 will be =sum of numbers up to 140- sum of numbers upto 81

140*141-81*82

=13098

Answer 2

Similar Homework Help Questions

Let cos A = with A in QII and find V10 cot (2A) Preview whathematical expression...

Let cos A = with A in QII and find V10 cot (2A) Preview whathematical expression [more.] Enter athathematical expression [more..]
Let f(x) = Enter antiderivative of f(x) Preview syntax error + C Enter an alpebraic expression...

Let f(x) = Enter antiderivative of f(x) Preview syntax error + C Enter an alpebraic expression (more..
Find the infinite sum, if it exists: -3 + (0.6) + ( - 0.12)+ .. Preview

Find the infinite sum, if it exists: -3 + (0.6) + ( - 0.12)+ .. Preview

Find the derivative of f(a) =-83 +7c 10 . Preview f'() Enter your answer as an...

Find the derivative of f(a) =-83 +7c 10 . Preview f'() Enter your answer as an expression. Example: 3x 2+1, x/5, (a+b)/c Be sure your variables match those in the question Get help: Video Points possible: 1 This is attempt 1 of 3 Message instructor about this question Submit Find the derivative of f(a) =-83 +7c 10 . Preview f'() Enter your answer as an expression. Example: 3x 2+1, x/5, (a+b)/c Be sure your variables match those in the question...
Given: z = x4 + xyº, < = uv4 + w?, y=u + vew 9 Find...

Given: z = x4 + xyº, < = uv4 + w?, y=u + vew 9 Find az when u = 3, v = 1, w = 0 au Preview Enter a mathematical expression (more..] 1
Find the mathematical expectation, variance and standard deviation of the sum of the digits on the...

Find the mathematical expectation, variance and standard deviation of the sum of the digits on the two selected cards.

2. a. Find the mathematical expression for the transient behavior of the voltage across the capacitor...

2. a. Find the mathematical expression for the transient behavior of the voltage across the capacitor of the following figure if the switch is thrown into position 1 at 0 s. 3 b. Repeat part (a) for ic c. Find the mathematical expressions for the response of ve and ic if the switch is thrown into position 2 at t 30 ms. d. 1.5 1.5 Find the mathematical expressions for the voltage vc and current ic if the switch is...
Expand the expression: (2x - 3) Preview 1 0 Question 12 P This is attempt of...

Expand the expression: (2x - 3) Preview 1 0 Question 12 P This is attempt of a) Consider the sequence: 8, 12, 16, 20 F ind the missing term above. Is this sequence arithmetic, geometric, or neither? b) Consider the sequence: 4, 16, 28, 40 Find the missing term above. Is this sequence arithmetic, geometric, or neither? c) Consider the sequence: 7, 12, 19, 28 Find the missing term above. Is this sequence arithmetic, geometric, or neither? d) Consider the...
What is the first step to be performed in the following mathematical expression? (EX) Select one:...

What is the first step to be performed in the following mathematical expression? (EX) Select one: O a. Square the sum of the scores. O b. Add the squared scores. 0 C. Add the scores. O d. Square each score.

How do I find the partial sum? Find the partial sum 1 + 10 + 19...

How do I find the partial sum? Find the partial sum 1 + 10 + 19 + .. . + 199. Preview