Question

if a=7 and d=2 what is the sum of first 11 term of AP​

Answer 1

Answer:

132

Step-by-step explanation:

S = n/2 [2a +(n-1)d] = 11/2 [2×7 + (11-1)]

= = 132

Answer 2

Answer:

Here, The sum of first 11 terms of this A.P. is 187.

Step-by-step explanation:

Here, As per our given question,

=a=7, d=2

Sum of first 11 terms= S11=n/2[2a+(n-1)d] wheren=11

=11/2[2×7+(11-1)×2]

=11/2[14+10×2]

=11/2[14+20]

=11/2×34

=11×17

=187

Hence, The sum of first 11 terms of this A.P. is 187.

Thank you.