The sum of first n terms of an AP is given by n^2+8n. Find a and d, and also find the sum of 50 terms.
Answers
Answered by
1
Answer:
a=9
d=1/2
Step-by-step explanation:
if sum of terms is given in quadratic equation in AP then d us always half of coffecient of n²
may be ur teacher did not tell
hope helpful
follow and Mark brainlist
Similar questions