3. If Sp. = 2730, then r = ?

If .^(15)P_(r)=2730 , then the value of r will be -

If S_p denote sum of the series 1+r^p+r^(2p)+ . . . oo and s_p denote the sum 1-r^p+r^(2p)-r^(3p) . . . oo , abs r lt 1 then S_p+s_p equals

The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number. A. 107 B. 106 C. 105 D. 103

A shopkeeper loses 16% when he sells an article for Rs 2,730. If he sells it for Rs. 3,458, his loss/gain percentage is

(i) If ""^(15)P_(r)=2730, find the value of r. (ii) If ""^(10)P_(r)=5040, find the value of r.

The threshold wavelength for tungsten is 2730 Å . The work function of tungsten is

In the organic compound CH_(2) = CH – CH_(2) – CH_(2) – C equivCH , the pair of hydridised orbitals involved in the formation of: C_(2) – C_(3) bond is: (a) sp – sp_(2) (b) sp – sp_(3) (c) sp_(2 )– sp_(3) (d) sp_(3) – sp_(3)

In the organic compound CH_(2) = CH – CH_(2) – CH_(2) – C equivCH , the pair of hydridised orbitals involved in the formation of: C_(2) – C_(3) bond is: (a) sp – sp_(2) (b) sp – sp_(3) (c) sp_(2 )– sp_(3) (d) sp_(3) – sp_(3)