In an arithematic sequence 8 times 8 th term is equal 12 times 12 th term ..find its 20 th term?
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Answer:
Hi buddy
Step-by-step explanation:
Then, nth term of the AP Tn=a+(n−1)d
Given, 8×T8=12×T12
=>8(a+(8−1)d)=12(a+(12−1)d)
=>8(a+7d)=12(a+11d)
=>2(a+7d)=3(a+11d)
=>2a+14d=3a+33d
=>a=−19d
So, T20=a+(20−1)d=−19d+19d=0
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