Hello guys
How many terms of the AP -6, -11/2 , -5 ...... are needed to give the sum -25 ? Explain the double answer.
Friends u have to explain only double answer and please give step by step explanation
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Hello guys
How many terms of the AP -6, -11/2 , -5 ...... are needed to give the sum -25 ? Explain the double answer.
Friends u have to explain only double answer and please give step by step explanation
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Answer:
Step-by-step explanation:
Jis step mein meine star lagaya hai uss step mein
If you put the value of x=20 inside the bracket toh bahar toh as it is 20 hoga and inside the bracket -5 ho jayega
That will give -100
Similarly,
If we put the value of x=5 inside the bracket toh bahar toh as it is 5 hoga and inside the bracket -20 ho jayega
That will again give -100
Therefore,
Both
X=5 and
X=20
Are correct