फाइंड द सम ऑफ फर्स्ट इलेवेंथ टर्म्स ऑफ एन ए पी ऑफ व्हिच द सिक्स्थ टर्म्स is 45?
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Answered by
1
Sixth term is 45
a + 5d = 45................[1]
Sum of 11 terms = 11/2 (2a + (11 - 1)d)
= 11/2 (2a + 10d)
= 11 x (a + 5d)
= 11 x 45 ................using equation 1
= 495
a + 5d = 45................[1]
Sum of 11 terms = 11/2 (2a + (11 - 1)d)
= 11/2 (2a + 10d)
= 11 x (a + 5d)
= 11 x 45 ................using equation 1
= 495
Answered by
0
Answer:
this is correct.................................
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