The sum of first 9 terms of an ap is261 and sum of 6terms-444 find common difference and first term
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Answered by
1
formulate the equations first
9/2(2a+8d)=261-------1eq.
6/2(2a+5d)=444-------2eq.
2a+8d=261*3/9
2a+8d=58
2a+5d=147
-. -. -
_________
3d=-89
d=-89{3
9/2(2a+8d)=261-------1eq.
6/2(2a+5d)=444-------2eq.
2a+8d=261*3/9
2a+8d=58
2a+5d=147
-. -. -
_________
3d=-89
d=-89{3
Answered by
4
Answer: a=149,d=-30
Step-by-step explanation:
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